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參數(shù)資料
| 型號： | L6910A |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION |
| 中文描述： | 可調(diào)降壓控制器采用同步整流 |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 453K |
| 代理商： | L6910A |
3/21
L6910A L6910
PINS FUNCTION
SO
1
HTSSOP
1
Name
VREF
Description
Internal 0.9V ±1.5% reference is available for external regulators or for the internal error
amplifier (connecting this pin to EAREF) if external reference is not available.
A minimum 1nF capacitor is required.
If the pin is forced to a voltage lower than 70%, the device enters the hiccup mode.
Oscillator switching frequency pin. Connecting an external resistor (R
T
) from this pin to
GND, the external frequency is increased according to the equation:
2
2
OSC
Connecting a resistor (R
T
) from this pin to Vcc (12V), the switching frequency is reduced
according to the equation:
If the pin is not connected, the switching frequency is 200KHz.
The voltage at this pin is fixed at 1.23V. Forcing a 50
μ
A current into this pin, the built in
oscillator stops to switch.
In Over Voltage condition this pin goes over 3V until that conditon is removed.
A resistor connected from this pin and the upper Mos Drain sets the current limit
protection.
The internal 200
μ
A current generator sinks a constant current through the external
resistor. The Over-Current threshold is due to the following equation:
I
R
DSon
3
3
OCSET
4
4
SS/INH
The soft start time is programmed connecting an external capacitor from this pin and
GND. The internal current generator forces through the capacitor 10
μ
A.
This pin can be used to disable the device forcing a voltage lower than 0.4V
This pin is connected to the error amplifier output and is used to compensate the voltage
control feedback loop.
This pin is connected to the error amplifier inverting input and is used to compensate the
voltage control feedback loop.
Connected to the output resistor divider, if used, or directly to Vout, it manages also over-
voltage conditions and the PGOOD signal
All the internal references are referred to this pin. Connect it to the PCB signal ground.
Error amplifier non-inverting input. Connect to this pin an external reference (from 0.9V to
3V) for the PWM regulation or short it to VREF pin to use the internal reference.
If this pin goes under 650mV (typ), the device shuts down.
This pin is an open collector output and it is pulled low if the output voltage is not within the
above specified thresholds. If not used it may be left floating.
This pin is connected to the source of the upper mosfet and provides the return path for the
high side driver. This pin monitors the drop across the upper mosfet for the current limit
together with OCSET.
High side gate driver output.
Bootstrap capacitor pin. Through this pin is supplied the high side driver and the upper
mosfet. Connect through a capacitor to the PHASE pin and through a diode to Vcc
(cathode vs. boot).
Power ground pin. This pin has to be connected closely to the low side mosfet source in
order to reduce the noise injection into the device
This pin is the lower mosfet gate driver output
Device supply voltage. The operative supply voltage ranges is from 5V to 12V.
DO NOT CONNECT V
IN
TO A VOLTAGE GREATER THAN V
CC
.
This pin is not internally bonded. It may be left floating or connected to GND.
5
6
COMP
6
7
FB
7
8
8
9
GND
EAREF
9
10
PGOOD
10
11
PHASE
11
12
12
13
HGATE
BOOT
13
14
PGND
14
15
‘5
16
LGATE
VCC
16
5
N.C.
f
OSC,RT
200KHz
6
T
)
-------------------------
+
=
f
OSC,RT
200KHz
7
T
----------------------------
–
=
I
P
---------------------------------------------
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6910ATR | 功能描述:DC/DC 開關(guān)控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| L6910G | 功能描述:電壓模式 PWM 控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| L6910GTR | 功能描述:電壓模式 PWM 控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| L6910R | 功能描述:DC/DC 開關(guān)控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| L6910RTR | 功能描述:DC/DC 開關(guān)控制器 5.0 to 12V Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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